鲁班锁八角球解法:移植uboot1.3.1到s3c2410

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移植uboot1.3.1到s3c2410（1）--建立开发板 (2009-07-30 17:15)分类： Bootloader相关

1 在U-Boot中建立自己的开发板类型，并测试编译

开发板取名叫: edukit2410。

开发板基本配置：

处理芯器片： S3C2410

NANDFLASH：K9F1208U0B 64M

NorFLASH： AM29LV160DB

网卡芯片： DM9000AEP

SDRAM： HY57V561620 32M * 2

LCD： LQ080V3DG01 TFT

移植u-boot版本：

U-boot: u-boot1.3.1

1）在工作目录下解压U－Boot

$ tar -xjvf u-boot-1.3.1.tar.bz2

2）进入U-Boot目录，修改Makefile

$ cd u-boot-1.3.1

$ kwrite Makefile

#为edukit2410建立编译项（建议从sbc2410_config复制后做相应的修改）。

sbc2410x_config: unconfig

@$(MKCONFIG) $(@:_config=) arm arm920t sbc2410x NULL s3c24x0

edukit2410_config : unconfig

@$(MKCONFIG) $(@:_config=) arm arm920t edukit2410 Embest s3c24x0

各项的意思如下:

arm: CPU的架构(ARCH)；

arm920t: CPU的类型(CPU)，其对应于cpu/arm920t子目录；

edukit2410: 开发板的型号(BOARD)，对应于board/Embest/edukit2410目录；

Embest: 开发者/或经销商(vender)；

s3c24x0: 片上系统(SOC)。

设置交叉编译工具。

$ source /usr/crosstool/gcc-3.4.5-glibc-2.3.6/arm-linux/path.sh

3）在/board子目录中建立自己的开发板edukit2410目录

由于我在上一步板子的开发者/或经销商(vender)中填了 Embest ，所以开发板edukit2410目录一定要建在/board子目录中的Embest目录下，否则编译会出错。

$ cd board

$ mkdir Embest Embest/edukit2410

$ cp -arf sbc2410x/* Embest/edukit2410/

$ cd Embest/edukit2410/

$ mv sbc2410x.c edukit2410.c

还要记得修改自己的开发板edukit2410目录下的Makefile文件，不然编译时会出错：

$ kwrite Makefile

COBJS := edukit2410.o flash.o

4）在include/configs/中建立配置头文件

$ cd ../../..

$ cp include/configs/sbc2410x.h include/configs/edukit2410.h

5）测试编译能否成功

（1）配置

$ make edukit2410_config

Configuring for edukit2410 board...

如果出现：

$ make edukit2410_config

Make1927: *** 遗漏分隔符。停止。

请在U－boot的根目录下的Makefile的

@$(MKCONFIG) $(@:_config=) arm arm920t edukit2410 Embest)

前加上“Tab”键

（2）测试编译

$make

测试通过后进行下一步。

2 修改U-boot文件，以支持nandflash读写

2.1 修改/cpu/arm920t/start.S

#include

#if defined(CONFIG_AT91RM9200DK)

#include /*这是针对AT91RM9200DK开发板的。对于SCB2440V4也有4个LED指示灯，我用来指示程序用行的进度。*/

#endif

......

* the actual start code

start_code:

* set the cpu to SVC32 mode

mrs r0,cpsr

bic r0,r0,#0x1f

orr r0,r0,#0xd3

msr cpsr,r0

#if defined(CONFIG_AT91RM9200DK)

bl coloured_LED_init

bl red_LED_on

#endif

1) 修改寄存器地址定义

#if defined(CONFIG_S3C2400) || defined(CONFIG_S3C2410)

/* turn off the watchdog */

#if defined(CONFIG_S3C2400)

#define pWTCON 0x15300000

#define INTMSK 0x14400008 /* Interupt-Controller base addresses */

#define CLKDIVN 0x14800014 /* clock divisor register */

#else

#define pWTCON 0x53000000

#define INTMSK 0x4A000008 /* Interupt-Controller base addresses */

#define INTSUBMSK 0x4A00001C

#define CLKDIVN 0x4C000014 /* clock divisor register */

#endif

#define CLK_CTL_BASE 0x4C000000 /* Embest */

#define MDIV_405 0x7f << 12 /* Embest */

#define PSDIV_405 0x21 /* Embest */

#define MDIV_200 0xa1 << 12 /* Embest */

#define PSDIV_200 0x31 /* Embest */

......

2) 修改中断禁止部分

#if defined(CONFIG_S3C2410)

ldr r1, =0x7ff /*根据2410芯片手册，INTSUBMSK有11位可用，

vivi也是0x7ff，U－Boot一直没改过来。*/

ldr r0, =INTSUBMSK

str r1, [r0]

#endif

3) 修改时钟设置

/* FCLK:HCLK:PCLK = 1:2:4 */

/* default FCLK is 12 MHz ! 在这里U－Boot有一个错误：以为默认时钟为120MHz。其实如果没有添加以下设置FCLK的语句，芯片内部的PLL是无效的，即FCLK为 12MHz。S3C24x0的芯片手册说得很明白。我一开始没有注意到这一点，是 CalmArrow提醒了我并和我讨论过，他也做过实验证实了这点。在这里对CalmArrow表示感谢和敬意！*/

ldr r0, =CLKDIVN

mov r1, #3

str r1, [r0]

mrc p15, 0, r1, c1, c0, 0 /*read ctrl register Embest*/

orr r1, r1, #0xc0000000 /*Asynchronous Embest*/

mcr p15, 0, r1, c1, c0, 0 /*write ctrl register Embest*/

/*now, CPU clock is 202.8 Mhz Embest*/

mov r1, #CLK_CTL_BASE /* Embest*/

mov r2, #MDIV_200 /* mpll_200mhz Embest*/

add r2, r2, #PSDIV_200 /* mpll_200mhz Embest*/

str r2, [r1, #0x04]

#endif /* CONFIG_S3C2400 || CONFIG_S3C2410 */

4) 将从Flash启动改成从NAND Flash启动。

在以下U－Boot的重定向语句段：

#ifdef CONFIG_AT91RM9200

#ifndef CONFIG_SKIP_RELOCATE_UBOOT

relocate: /* relocate U-Boot to RAM */

adr r0, _start /* r0 <- current position of code */

ldr r1, _TEXT_BASE /* test if we run from flash or RAM */

cmp r0, r1 /* don't reloc during debug */

beq stack_setup

ldr r2, _armboot_start

ldr r3, _bss_start

sub r2, r3, r2 /* r2 <- size of armboot */

add r2, r0, r2 /* r2 <- source end address*/

copy_loop:

ldmia {r3-r10} /* copy from source address [r0] */

stmia {r3-r10} /* copy to target address [r1] */

cmp r0, r2 /* until source end addreee [r2] */

ble copy_loop

#endif /* CONFIG_SKIP_RELOCATE_UBOOT */

#endif

的后面添加上：

#ifdef CONFIG_S3C2410_NAND_BOOT

@ reset NAND

mov r1, #NAND_CTL_BASE

ldr r2, =0xf830 @ initial value

str r2, [r1, #oNFCONF]

ldr r2, [r1, #oNFCONF]

bic r2, r2, #0x800 @ enable chip

str r2, [r1, #oNFCONF]

mov r2, #0xff @ RESET command

strb r2, [r1, #oNFCMD]

mov r3, #0 @ wait

nand1:

add r3, r3, #0x1

cmp r3, #0xa

blt nand1

nand2:

ldr r2, [r1, #oNFSTAT] @ wait ready

tst r2, #0x1

beq nand2

ldr r2, [r1, #oNFCONF]

orr r2, r2, #0x800 @ disable chip

str r2, [r1, #oNFCONF]

@ get read to call C s (for nand_read())

ldr sp, DW_STACK_START @ setup stack pointer

mov fp, #0 @ no previous , so fp=0

@ copy U-Boot to RAM

ldr r0, =TEXT_BASE

mov r1, #0x0

mov r2, #0x30000

bl nand_read_ll

tst r0, #0x0

beq ok_nand_read

bad_nand_read:

loop2: b loop2 @ infinite loop

ok_nand_read:

@ verify

mov r0, #0

ldr r1, =TEXT_BASE

mov r2, #0x400 @ 4 bytes * 1024 = 4K-bytes

go_next:

ldr r3, [r0], #4

ldr r4, [r1], #4

teq r3, r4

bne notmatch

subs r2, r2, #4

beq stack_setup

bne go_next

notmatch:

loop3: b loop3 @ infinite loop

#endif @ CONFIG_S3C2410_NAND_BOOT

在“ldr pc, _start_armboot”之前加入：

# if defined(CONFIG_edukit2410_LED)

@ LED1 on u-boot stage 1 is

ldr r0, =0x56000060

ldr r1, =0xff4af769

str r1, [r0]

ldr r0, =0x56000068

ldr r1, =0xffff

str r1, [r0]

ldr r0, =0x21180000

ldr r1, =0xfc

strb r1, [r0]

#endif

//修改目的：如果看到只有LED1亮了，说明U－Boot的第一阶段已完成！

在 “ _start_armboot: .word start_armboot ” 后加入：

.align 2

DW_STACK_START: .word STACK_BASE+STACK_SIZE-4

2.2 创建nandflash读函数

在board/Embest/edukit2410加入NAND Flash读函数文件，拷贝vivi中的nand_read.c文件到此文件夹即可：

#include

#define __REGb(x) (*(volatile unsigned char *)(x))

#define __REGi(x) (*(volatile unsigned int *)(x))

#define NF_BASE 0x4e000000

# if defined(CONFIG_S3C2410)

#define NFCONF __REGi(NF_BASE + 0x0)

#define NFCMD __REGb(NF_BASE + 0x4)

#define NFADDR __REGb(NF_BASE + 0x8)

#define NFDATA __REGb(NF_BASE + 0xc)

#define NFSTAT __REGb(NF_BASE + 0x10)

#define BUSY 1

inline void wait_idle(void) {

int i;

while(!(NFSTAT & BUSY))

for(i=0; i<10; i++);

}

/* low level nand read */

int

nand_read_ll(unsigned char *buf, unsigned long start_addr, int size)

{

int i, j;

if ((start_addr & NAND_BLOCK_MASK) || (size & NAND_BLOCK_MASK)) {

return -1; /* invalid alignment */

}

/* chip Enable */

NFCONF &= ~0x800;

for(i=0; i<10; i++);

for(i=start_addr; i < (start_addr + size);) {

/* READ0 */

NFCMD = 0;

/* Write Address */

NFADDR = i & 0xff;

NFADDR = (i >> 9) & 0xff;

NFADDR = (i >> 17) & 0xff;

NFADDR = (i >> 25) & 0xff;

wait_idle();

for(j=0; j < NAND_SECTOR_SIZE; j++, i++) {

*buf = (NFDATA & 0xff);

buf++;

}

/* chip Disable */

NFCONF |= 0x800; /* chip disable */

return 0;

}

# endif

2.3 修改board/Embest/edukit2410/Makefile文件

......

OBJS := edukit2410.o nand_read.o flash.o

......

2.4 修改include/configs/edukit2410.h文件

1) 在文件末添加如下内容：

......

* Nandflash Boot

#define STACK_BASE 0x33f00000

#define STACK_SIZE 0x8000

//#define UBOOT_RAM_BASE 0x33f80000

/* NAND Flash Controller */

#define NAND_CTL_BASE 0x4E000000

#define bINT_CTL(Nb) __REG(INT_CTL_BASE + (Nb))

/* Offset */

#define oNFCONF 0x00

# if defined(CONFIG_S3C2410)

#define CONFIG_S3C2410_NAND_BOOT 1

/* Offset */

#define oNFCONF 0x00

#define oNFCMD 0x04

#define oNFADDR 0x08

#define oNFDATA 0x0c

#define oNFSTAT 0x10

#define oNFECC 0x14

#define rNFCONF (*(volatile unsigned int *)0x4e000000)

#define rNFCMD (*(volatile unsigned char *)0x4e000004)

#define rNFADDR (*(volatile unsigned char *)0x4e000008)

#define rNFDATA (*(volatile unsigned char *)0x4e00000c)

#define rNFSTAT (*(volatile unsigned int *)0x4e000010)

#define rNFECC (*(volatile unsigned int *)0x4e000014)

#define rNFECC0 (*(volatile unsigned char *)0x4e000014)

#define rNFECC1 (*(volatile unsigned char *)0x4e000015)

#define rNFECC2 (*(volatile unsigned char *)0x4e000016)

#endif

/*JFFS2 Support */

#undef CONFIG_JFFS2_CMDLINE

#define CONFIG_JFFS2_NAND 1

#define CONFIG_JFFS2_DEV "nand0"

#define CONFIG_JFFS2_PART_SIZE 0x4c0000

#define CONFIG_JFFS2_PART_OFFSET 0x40000

/*JFFS2 Support */

/* USB Support 080218 */

#define CONFIG_USB_OHCI

#define CONFIG_USB_STORAGE

#define CONFIG_USB_KEYBOARD

#define CONFIG_DOS_PARTITION

#define CFG_DEVICE_DEREGISTER

#define CONFIG_SUPPORT_VFAT

#define LITTLEENDIAN

/* USB Support 080218 */

/*yaffs support*/

#define CFG_NAND_YAFFS1_NEW_OOB_LAYOUT 1

#define ENABLE_CMD_NAND_YAFFS 1

#define ENABLE_CMD_NAND_YAFFS_SKIPFB 1

#define CFG_NAND_YAFFS1_NEW_OOB_LAYOUT 1

/*yaffs support*/

#endif /* __CONFIG_H */

2) 选择串口端口，使信息能够通过uart1进行打印

因为linux内核中配置的打印端口为uart1。

* select serial console configuration

#define CONFIG_SERIAL2 1 /* we use SERIAL 2（uart1） on edukit */

2.1 修改board/Embest/edukit2410/lowlevel_init.S文件

依照开发板的内存区的配置情况, 修改board/Embest/edukit2410/lowlevel_init.S文件，

......

#define B1_BWSCON (DW32)

#define B2_BWSCON (DW16)

#define B3_BWSCON (DW16+UBLB)

#define B4_BWSCON (DW16)

#define B5_BWSCON (DW16)

#define B6_BWSCON (DW32)

#define B7_BWSCON (DW32)......

……

//#define B3_Tacs 0xc

//#define B3_Tcos 0x7

//#define B3_Tacc 0xf

//#define B3_Tcoh 0x1

#define B3_Tacs 0x0

#define B3_Tcos 0x0

#define B3_Tacc 0x7

#define B3_Tcoh 0x0

#define B3_Tah 0x0

#define B3_Tacp 0x0

#define B3_PMC 0x0

......

//#define B5_Tacs 0xc

//#define B5_Tcos 0x7

//#define B5_Tacc 0xf

//#define B5_Tcoh 0x1

#define B5_Tacs 0x0

#define B5_Tcos 0x0

#define B5_Tacc 0x7

#define B5_Tcoh 0x0

#define B5_Tah 0x0

#define B5_Tacp 0x0

#define B5_PMC 0x0

......

#define B6_MT 0x3 /* SDRAM */

#define B6_Trcd 0x1

#define B6_SCAN 0x1 /* 9bit */

#define B7_MT 0x3 /* SDRAM */

#define B7_Trcd 0x1 /* 3clk */

#define B7_SCAN 0x1 /* 9bit */

……

.word ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT)

.word 0x32

.word 0x30

2.2 修改/board/Embest/edukit2410/edukit2410.c

修改其对GPIO和PLL的配置(请参阅开发板的硬件说明和芯片手册)：

......

#define FCLK_SPEED 1

#if FCLK_SPEED==0 /* Fout = 203MHz, Fin = 12MHz for Audio */

#define M_MDIV 0xC3

#define M_PDIV 0x4

#define M_SDIV 0x1

#elif FCLK_SPEED==1

#if defined(CONFIG_S3C2410)

/* Fout = 202.8MHz */

#define M_MDIV 0xA1

#define M_PDIV 0x3

#define M_SDIV 0x1

#endif

#define USB_CLOCK 1

#if USB_CLOCK==0

#define U_M_MDIV 0xA1

#define U_M_PDIV 0x3

#define U_M_SDIV 0x1

#elif USB_CLOCK==1

#if defined(CONFIG_S3C2410)

#define U_M_MDIV 0x48

#define U_M_PDIV 0x3

#endif

#if defined(CONFIG_S3C2440)

#define U_M_MDIV 0x38

#define U_M_PDIV 0x2

#endif

#define U_M_SDIV 0x2

#endif

......

/* set up the I/O ports */

gpio->GPACON = 0x5fbfff;

gpio->GPBCON = 0x155559;

gpio->GPBUP = 0x7ff;

gpio->GPCCON = 0xaaaa55aa;

gpio->GPCUP = 0xffff;

gpio->GPDCON = 0xAAAAAAAA;

gpio->GPDUP = 0x0000FFFF;

gpio->GPECON = 0xa6aaaaaa;

gpio->GPEUP = 0xffff;

//gpio->GPEDATA = 0x2000;

gpio->GPFCON = 0x000055AA;

gpio->GPFUP = 0x000000FF;

#if defined(CONFIG_edukit2410_LED)

gpio->GPGCON = 0xff4af7b9;

gpio->GPGUP = 0xffff;

#else

gpio->GPGCON = 0xFF95FF3A;

gpio->GPGUP = 0x0000FFFF;

#endif

//gpio->GPGDATA = 0xffcf;

gpio->GPHCON = 0x2aaaaa;

gpio->GPHUP = 0x000007FF;

gpio->EXTINT0=0x22222222;

gpio->EXTINT1=0x22222222;

gpio->EXTINT2=0x22222222;

#if defined(CONFIG_S3C2410)

/* arch number of SMDK2410-Board */

gd->bd->bi_arch_number = MACH_TYPE_SMDK2410;

#endif

/* adress of boot parameters */

gd->bd->bi_boot_params = 0x30000100;

icache_enable();

dcache_enable();

# if defined(CONFIG_edukit2410_LED)

//int board_init (void)设置完成后，LED1和LED2会亮起！

#endif

return 0;

}

2.3 为了实现NAND Flash的读写，再次修改/include/configs/edukit2410.h

......

* High Level Configuration Options

* (easy to change)

#define CONFIG_ARM920T 1 /* This is an ARM920T Core */

#define CONFIG_S3C2410 1 /* in a SAMSUNG S3C2410 SoC */

//#define CONFIG_SBC2410X 1 /* on a friendly-arm SBC-2410X Board */

#define CONFIG_edukit2410 1

#define CONFIG_edukit2410_LED 1

......

* Command line configuration.

#include

#define CONFIG_CMD_ASKENV

#define CONFIG_CMD_CACHE

#define CONFIG_CMD_DATE

#define CONFIG_CMD_DHCP

#define CONFIG_CMD_ELF

#define CONFIG_CMD_PING

#define CONFIG_CMD_NAND

#define CONFIG_CMD_REGINFO

#define CONFIG_CMD_JFFS2

/* JFFS2 Support 080218 */

#define CONFIG_CMD_USB

/* USB Support 080218 */

#define CONFIG_CMD_FAT

/* FAT support 080218 */

......

#define CFG_LONGHELP

/* undef to save memory */

#define CFG_PROMPT "[Edukit2410]#"

/*Monitor Command Prompt */

#define CFG_CBSIZE 256

/* Console I/O Buffer Size */

......

#define CFG_LOAD_ADDR 0x30800000

/* default load address */

......

/* timeout values are in ticks */

#define CFG_FLASH_ERASE_TOUT (5*CFG_HZ) /* Timeout for Flash Erase */

#define CFG_FLASH_WRITE_TOUT (5*CFG_HZ) /* Timeout for Flash Write */

#define CFG_ENV_IS_IN_NAND 1

#define CFG_ENV_OFFSET 0X30000

#define CFG_NAND_LEGACY

//#define CFG_ENV_IS_IN_FLASH 1

#define CFG_ENV_SIZE 0x10000 /* Total Size of Environment Sector */

/*----------------------------------------------------------------------

* NAND flash settings

#if defined(CONFIG_CMD_NAND)

#define CFG_NAND_BASE 0x4E000000

/* NandFlash控制器在SFR区起始寄存器地址 */

#define CFG_MAX_NAND_DEVICE 1

/* 支持的最在Nand Flash数据 */

#define SECTORSIZE 512

/* 1页的大小 */

#define NAND_SECTOR_SIZE SECTORSIZE

#define NAND_BLOCK_MASK 511

/* 页掩码 */

#define ADDR_COLUMN 1

/* 一个字节的Column地址 */

#define ADDR_PAGE 3

/* 3字节的页块地址!!!!!*/

#define ADDR_COLUMN_PAGE 4

/* 总共4字节的页块地址!!!!! */

#define NAND_ChipID_UNKNOWN 0x00

/* 未知芯片的ID号 */

#define NAND_MAX_FLOORS 1

#define NAND_MAX_CHIPS 1

//#define NAND_WAIT_READY(nand) NF_WaitRB()

//#define NAND_DISABLE_CE(nand) NF_SetCE(NFCE_HIGH)

//#define NAND_ENABLE_CE(nand) NF_SetCE(NFCE_LOW)

//#define WRITE_NAND_COMMAND(d, adr) NF_Cmd(d)

//#define WRITE_NAND_COMMANDW(d, adr) NF_CmdW(d)

//#define WRITE_NAND_ADDRESS(d, adr) NF_Addr(d)

//#define WRITE_NAND(d, adr) NF_Write(d)

//#define READ_NAND(adr) NF_Read()

/* Nand Flash命令层底层接口函数 */

#define WRITE_NAND_ADDRESS(d, adr) {rNFADDR = d;}

#define WRITE_NAND(d, adr) {rNFDATA = d;}

#define READ_NAND(adr) (rNFDATA)

#define NAND_WAIT_READY(nand) {while(!(rNFSTAT&(1<<0)));}

#define WRITE_NAND_COMMAND(d, adr) {rNFCMD = d;}

#define WRITE_NAND_COMMANDW(d, adr) NF_CmdW(d)

#define NAND_DISABLE_CE(nand) {rNFCONF |= (1<<11);}

#define NAND_ENABLE_CE(nand) {rNFCONF &= ~(1<<11);}

/* the following s are NOP's because S3C24X0 handles this in hardware */

#define NAND_CTL_CLRALE(nandptr)

#define NAND_CTL_SETALE(nandptr)

#define NAND_CTL_CLRCLE(nandptr)

#define NAND_CTL_SETCLE(nandptr)

/* 允许Nand Flash写校验 */

#define CONFIG_MTD_NAND_VERIFY_WRITE 1

......

#endif /* __CONFIG_H */

2.1 修改文件/cpu/arm920t/s3c24x0/interrupts.c文件

在个文件中添加“defined(CONFIG_edukit2410)”，使得原来SBC2410X的代码可以编译进来。第181行:

#elif defined(CONFIG_SBC2410X) || \

defined(CONFIG_SMDK2410) || \

defined(CONFIG_VCMA9) ||defined(CONFIG_edukit2410)

2.2 修改include/linux/mtd/nand_ids.h

在结构体nand_flash_ids加入

static struct nand_flash_dev nand_flash_ids[] = {

......

{"Samsung K9F1208U0B", NAND_MFR_SAMSUNG, 0x76, 26, 0, 3, 0x4000, 0},

{NULL,}

};

2.3 修改include/linux/mtd/nand.h

* Constants for hardware specific CLE/ALE/NCE

#if 0

/* Select the chip by setting nCE to low */

#define NAND_CTL_SETNCE 1

/* Deselect the chip by setting nCE to high */

#define NAND_CTL_CLRNCE 2

/* Select the command latch by setting CLE to high */

#define NAND_CTL_SETCLE 3

/* Deselect the command latch by setting CLE to low */

#define NAND_CTL_CLRCLE 4

/* Select the address latch by setting ALE to high */

#define NAND_CTL_SETALE 5

/* Deselect the address latch by setting ALE to low */

#define NAND_CTL_CLRALE 6

/* Set write protection by setting WP to high. Not used! */

#define NAND_CTL_SETWP 7

/* Clear write protection by setting WP to low. Not used! */

#define NAND_CTL_CLRWP 8

#endif

2.4 修改/lib_arm中的board.c

......

#include

......

static int display_banner (void)

{

# if defined(CONFIG_edukit2410_LED)

//在串口初始化和console初始化完成，串口输出信息之前，LED1、LED2、LED3会亮起！

#endif

printf ("\n\n%s\n\n", version_string);

debug ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",

_armboot_start, _bss_start, _bss_end);

#ifdef CONFIG_MODEM_SUPPORT

debug ("Modem Support enabled\n");

#endif

#ifdef CONFIG_USE_IRQ

debug ("IRQ Stack: %08lx\n", IRQ_STACK_START);

debug ("FIQ Stack: %08lx\n", FIQ_STACK_START);

#endif

return (0);

}

......

void start_armboot (void)

{

init_fnc_t **init_fnc_ptr;

char *s;

#ifndef CFG_NO_FLASH

ulong size;

#endif

#if defined(CONFIG_VFD) || defined(CONFIG_LCD)

unsigned long addr;

#endif

# if defined(CONFIG_edukit2410_LED)

S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();

#endif

......

# if defined(CONFIG_edukit2410_LED)

//在进入命令提示符之前，四个LED会同时亮起！

#endif

/* main_loop() can return to retry autoboot, if so just run it again. */

for (;;) {

main_loop ();

}

/* NOTREACHED - no way out of command loop except booting */

}

2.5 修改common/env_nand.c

......

#ifdef CONFIG_INFERNO

#error CONFIG_INFERNO not supported yet

#endif

int nand_legacy_rw (struct nand_chip* nand, int cmd,

size_t start, size_t len,

size_t * retlen, u_char * buf);

extern struct nand_chip nand_dev_desc[CFG_MAX_NAND_DEVICE];

extern int nand_legacy_erase(struct nand_chip *nand, size_t ofs, size_t len, int clean);

/* info for NAND chips, defined in drivers/nand/nand.c */

extern nand_info_t nand_info[CFG_MAX_NAND_DEVICE];

......

#else /* ! CFG_ENV_OFFSET_REDUND */

int saveenv(void)

{

ulong total;

int ret = 0;

puts ("Erasing Nand...");

//if (nand_erase(&nand_info[0], CFG_ENV_OFFSET, CFG_ENV_SIZE))

if (nand_legacy_erase(nand_dev_desc + 0, CFG_ENV_OFFSET, CFG_ENV_SIZE, 0))

return 1;

puts ("Writing to Nand... ");

total = CFG_ENV_SIZE;

//ret = nand_write(&nand_info[0], CFG_ENV_OFFSET, &total, (u_char*)env_ptr);

ret = nand_legacy_rw(nand_dev_desc + 0,

0x00 | 0x02, CFG_ENV_OFFSET, CFG_ENV_SIZE,

&total, (u_char*)env_ptr);

if (ret || total != CFG_ENV_SIZE)

return 1;

puts ("done\n");

return ret;

......

#else /* ! CFG_ENV_OFFSET_REDUND */

* The legacy NAND code saved the environment in the first NAND device i.e.,

* nand_dev_desc + 0. This is also the behaviour using the new NAND code.

void env_relocate_spec (void)

{

#if !defined(ENV_IS_EMBEDDED)

ulong total;

int ret;

total = CFG_ENV_SIZE;

//ret = nand_read(&nand_info[0], CFG_ENV_OFFSET, &total, (u_char*)env_ptr);

ret = nand_legacy_rw(nand_dev_desc + 0, 0x01 | 0x02, CFG_ENV_OFFSET, CFG_ENV_SIZE, &total, (u_char*)env_ptr);

......

2.1 在/board/Embest/edukit2410/edukit2410.c文件的末尾添加对Nand Flash 的初始化函数（在后面Nand Flash的操作都要用到）

u-boot运行至第二阶段进入start_armboot()函数。其中nand_init()函数是对nand flash的最初初始化函数。Nand_init()函数在两个文件中实现。其调用与CFG_NAND_LEGACY宏有关，如果没有定义这个宏，系统调用 drivers/nand/nand.c中的nand_init()；否则调用自己在board/Embest/edukit2410/edukit2410.c中的nand_init()函数。这里我选择第二种方式。

#if defined(CONFIG_CMD_NAND)

typedef enum {

NFCE_LOW,

NFCE_HIGH

} NFCE_STATE;

static inline void NF_Conf(u16 conf)

{

S3C2410_NAND * const nand = S3C2410_GetBase_NAND();

nand->NFCONF = conf;

}

static inline void NF_Cmd(u8 cmd)

{

S3C2410_NAND * const nand = S3C2410_GetBase_NAND();

nand->NFCMD = cmd;

}

static inline void NF_CmdW(u8 cmd)

{

NF_Cmd(cmd);

udelay(1);

}

static inline void NF_Addr(u8 addr)

{

S3C2410_NAND * const nand = S3C2410_GetBase_NAND();

nand->NFADDR = addr;

}

static inline void NF_WaitRB(void)

{

S3C2410_NAND * const nand = S3C2410_GetBase_NAND();

while (!(nand->NFSTAT & (1<<0)));

}

static inline void NF_Write(u8 data)

{

S3C2410_NAND * const nand = S3C2410_GetBase_NAND();

nand->NFDATA = data;

}

static inline u8 NF_Read(void)

{

S3C2410_NAND * const nand = S3C2410_GetBase_NAND();

return(nand->NFDATA);

}

static inline u32 NF_Read_ECC(void)

{

S3C2410_NAND * const nand = S3C2410_GetBase_NAND();

return(nand->NFECC);

}

static inline void NF_SetCE(NFCE_STATE s)

{

S3C2410_NAND * const nand = S3C2410_GetBase_NAND();

switch (s) {

case NFCE_LOW:

nand->NFCONF &= ~(1<<11);

break;

case NFCE_HIGH:

nand->NFCONF |= (1<<11);

break;

}

static inline void NF_Init_ECC(void)

{

S3C2410_NAND * const nand = S3C2410_GetBase_NAND();

nand->NFCONF |= (1<<12);

}

extern ulong nand_probe(ulong physadr);

static inline void NF_Reset(void)

{

int i;

NF_SetCE(NFCE_LOW);

NF_Cmd(0xFF); /* reset command */

for(i = 0; i < 10; i++); /* tWB = 100ns. */

NF_WaitRB(); /* wait 200~500us; */

NF_SetCE(NFCE_HIGH);

}

static inline void NF_Init(void)

{

#if 0

#define TACLS 0

#define TWRPH0 3

#define TWRPH1 0

#else

#define TACLS 0

#define TWRPH0 4

#define TWRPH1 2

#endif

#if defined(CONFIG_S3C2440)

NF_Conf((TACLS<<12)|(TWRPH0<<8)|(TWRPH1<<4));

NF_Cont((1<<6)|(1<<4)|(1<<1)|(1<<0));

#else

NF_Conf((1<<15)|(0<<14)|(0<<13)|(1<<12)|(1<<11)|(TACLS<<8)|(TWRPH0<<4)|(TWRPH1<<0));

/*nand->NFCONF = (1<<15)|(1<<14)|(1<<13)|(1<<12)|(1<<11)|(TACLS<<8)|(TWRPH0<<4)|(TWRPH1<<0); */

/* 1 1 1 1, 1 xxx, r xxx, r xxx */

/* En 512B 4step ECCR nFCE=H tACLS tWRPH0 tWRPH1 */

#endif

NF_Reset();

}

void nand_init(void)

{

S3C2410_NAND * const nand = S3C2410_GetBase_NAND();

NF_Init();

#ifdef DEBUG

printf("NAND flash probing at 0x%.8lX\n", (ulong)nand);

#endif

printf ("%4lu MB\n", nand_probe((ulong)nand) >> 20);

}

#endif

1 修改U-boot文件，以支持DM9000AEP

由于sbc2410x开发板支持的是cs8900，而EdukitIV使用的是DM9000AEP网卡芯片，所以要如果要实现对与DM9000AEP的支持需要对U-boot的代码做一些适当的修改。

3.1 修改include/configs/edukit2410.h文件

* Hardware drivers

//#define CONFIG_DRIVER_CS8900 0 /* we have a CS8900 on-board */

//#define CS8900_BASE 0x20100000

//#define CS8900_BUS16 1 /* the Linux driver does accesses as shorts */

#define CONFIG_DRIVER_DM9000 1

#define CONFIG_DM9000_BASE 0x20000000

#define DM9000_IO CONFIG_DM9000_BASE

#define DM9000_DATA 0x20100000

#define CONFIG_DM9000_USE_16BIT

#define CONFIG_DM9000_DEBUG

......

/*修改启动参数，使能通过tftp引导内核，使用yaffs文件系统*/

#define CONFIG_BOOTDELAY 3

#define CONFIG_BOOTARGS "console=ttySAC1 root=/dev/mtdblock/3 rootfstype=yaffs"

/*使用yaffs文件系统*/

#define CONFIG_ETHADDR 08:00:3e:26:0a:5b

#define CONFIG_NETMASK 255.255.255.0

#define CONFIG_IPADDR 192.168.2.201

/*设置开发板ip地址*/

#define CONFIG_SERVERIP 192.168.2.34

/*设置tftp服务器ip地址*/

/*#define CONFIG_BOOTFILE "uImage" */

#define CONFIG_BOOTCOMMAND "tftp 30800000 uImage\; bootm"

在EdukitIV中，有两个网卡，分别位于核心板和主板上。

其中：

主板网卡的I/O地址为：0x20000000，data地址为：0x20000000。

核心板网卡的I/O地址为：0x10000000，data地址为：0x10000002。

3.2 修改lib_arm/board.c文件

......

#ifdef CONFIG_DRIVER_CS8900

extern void cs8900_get_enetaddr (uchar * addr);

#endif

#ifdef CONFIG_DRIVER_DM9000

extern int eth_init(bd_t *bd);

#endif

......

#ifdef CONFIG_DRIVER_CS8900

cs8900_get_enetaddr (gd->bd->bi_enetaddr);

#endif

#ifdef CONFIG_DRIVER_DM9000

eth_init(gd->bd);

#endif

......

3.3 修改drivers\net\dm9000x.c文件

......

/* For module input parameter */

//static int media_mode = DM9000_AUTO;

static int media_mode = DM9000_100MFD; /*use full duplex mode */

static u8 nfloor = 0;

......

void eth_halt(void);

void eth_halt_true(void);

static int dm9000_probe(void);

......

#ifdef CONFIG_DM9000_DEBUG

static void

dump_regs(void)

{

DM9000_DBG("\n");

DM9000_DBG("NCR (0x00): %02x\n", DM9000_ior(0));

DM9000_DBG("NSR (0x01): %02x\n", DM9000_ior(1));

DM9000_DBG("TCR (0x02): %02x\n", DM9000_ior(2));

DM9000_DBG("TSRI (0x03): %02x\n", DM9000_ior(3));

DM9000_DBG("TSRII (0x04): %02x\n", DM9000_ior(4));

DM9000_DBG("RCR (0x05): %02x\n", DM9000_ior(5));

DM9000_DBG("RSR (0x06): %02x\n", DM9000_ior(6));

// DM9000_DBG("ISR (0xFE): %02x\n", DM9000_ior(ISR));

DM9000_DBG("\n");

}

#endif /* */

......

int

eth_init(bd_t * bd)

{

int i, oft, lnk;

DM9000_DBG("eth_init()\n");

// eth_halt_true();

/* RESET device */

dm9000_reset();

dm9000_probe();

/* NIC Type: FASTETHER, HOMERUN, LONGRUN */

// identify_nic();

/* GPIO0 on pre-activate PHY */

DM9000_iow(DM9000_GPR, 0x00); /*REG_1F bit0 activate phyxcer */

/* copy from set_PHY_mode, do not set phy mode */

DM9000_iow(DM9000_GPCR, 0x01); /* Let GPIO0 output */

DM9000_iow(DM9000_GPR, 0x00); /* Enable PHY */

/* Set PHY */

// set_PHY_mode();

/* Program operating register */

// DM9000_iow(DM9000_NCR, 0x0); /* only intern phy supported by now */

DM9000_iow(DM9000_TCR, 0); /* TX Polling clear */

DM9000_iow(DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */

DM9000_iow(DM9000_FCTR, FCTR_HWOT(3) | FCTR_LWOT(8)); /* Flow Control : High/Low Water */

DM9000_iow(DM9000_FCR, 0x0); /* SH FIXME: This looks strange! Flow Control */

DM9000_iow(DM9000_SMCR, 0); /* Special Mode */

DM9000_iow(DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END); /* clear TX status */

DM9000_iow(DM9000_ISR, 0x0f); /* Clear interrupt status */

/* Set Node address */

// for (i = 0; i < 6; i++)

// ((u16 *) bd->bi_enetaddr)[i] = read_srom_word(i);

if (is_zero_ether_addr(bd->bi_enetaddr) ||

is_multicast_ether_addr(bd->bi_enetaddr)) {

......

#if 0

i = 0;

while (!(phy_read(1) & 0x20)) { /* autonegation complete bit */

udelay(1000);

i++;

if (i == 10000) {

printf("could not establish link\n");

return 0;

}

#endif

#if 0

/* see what we've got */

lnk = phy_read(17) >> 12;

printf("operating at ");

switch (lnk) {

case 1:

printf("10M half duplex ");

break;

case 2:

printf("10M full duplex ");

break;

case 4:

printf("100M half duplex ");

break;

case 8:

printf("100M full duplex ");

break;

default:

printf("unknown: %d ", lnk);

break;

}

printf("mode\n");

#endif

printf("operating at 100M full duplex mode\n");

return 0;

}

......

Stop the interface.

The interface is stopped when it is brought.

void eth_halt(void){}

void

eth_halt_true(void)

{

DM9000_DBG("eth_halt\n");

/* RESET devie */

phy_write(0, 0x8000); /* PHY RESET */

DM9000_iow(DM9000_GPR, 0x01); /* Power-Down PHY */

DM9000_iow(DM9000_IMR, 0x80); /* Disable all interrupt */

DM9000_iow(DM9000_RCR, 0x00); /* Disable RX */

}

......

/* Check packet ready or not */

DM9000_ior(DM9000_MRRH);

DM9000_ior(DM9000_MRRL); //must add this two read

DM9000_ior(DM9000_MRCMDX); /* Dummy read */

rxbyte = DM9000_inb(DM9000_DATA); /* Got most updated data */

/* Status check: this byte must be 0 or 1 */

if (rxbyte > 1) {

DM9000_iow(DM9000_RCR, 0x00); /* Stop Device */

DM9000_iow(DM9000_ISR, 0x80); /* Stop INT request */

DM9000_DBG("rx status check: %d\n", rxbyte);

return;

}

......

Read a word from phyxcer

static u16

phy_read(int reg)

{

u16 val;

/* Fill the phyxcer register into REG_0C */

DM9000_iow(DM9000_EPAR, DM9000_PHY | reg);

DM9000_iow(DM9000_EPCR, 0xc); /* Issue phyxcer read command */

// udelay(100); /* Wait read complete */ //weiyan

udelay(1000); /* Wait read complete */

DM9000_iow(DM9000_EPCR, 0x0); /* Clear phyxcer read command */

val = (DM9000_ior(DM9000_EPDRH) << 8) | DM9000_ior(DM9000_EPDRL);

/* The read data keeps on REG_0D & REG_0E */

DM9000_DBG("phy_read(%d): %d\n", reg, val);

return val;

}

Write a word to phyxcer

static void

phy_write(int reg, u16 value)

{

/* Fill the phyxcer register into REG_0C */

DM9000_iow(DM9000_EPAR, DM9000_PHY | reg);

/* Fill the written data into REG_0D & REG_0E */

DM9000_iow(DM9000_EPDRL, (value & 0xff));

DM9000_iow(DM9000_EPDRH, ((value >> 8) & 0xff));

DM9000_iow(DM9000_EPCR, 0xa); /* Issue phyxcer write command */

// udelay(500); /* Wait write complete */ /

udelay(1000); /* Wait write complete */

DM9000_iow(DM9000_EPCR, 0x0); /* Clear phyxcer write command */

DM9000_DBG("phy_write(reg:%d, value:%d)\n", reg, value);

}

#endif /* CONFIG_DRIVER_DM9000 */

4 修改U-boot文件，添加LCD驱动

4.1 驱动lcd，并刷屏

1）修改include/configs/edukit2410.h文件

#define CONFIG_DRIVER_LCD

/*suport LCD*/

#endif /* __CONFIG_H */

2）添加LCD驱动及初始化函数

在/board/Embest/edukit2410/目录下建立文件，命名为lcd.c,并将以下代码拷贝到该文件中。

/******************************************************************************************

* File?? lcdapp.c

* Author: Embest

* Desc?? LCD_Test

* History:

*************************************************************************************/

/*------------------------------------------------------------------------------------------*/

/* include files */

/*------------------------------------------------------------------------------------------*/

//#include "2410lib.h"

//#include "lcdlib.h"

#define UINT32T unsigned int

#define INT16T short int

#define UINT8T unsigned char

/*------------------------------------------------------------------------------------------*/

/* constant define */

/*------------------------------------------------------------------------------------------*/

#define LCD_BUF_SIZE (SCR_XSIZE_TFT_640480*SCR_YSIZE_TFT_640480/2)

#define LCD_ACTIVE_BUFFER (0x33800000)

#define LCD_VIRTUAL_BUFFER (0x33800000 + LCD_BUF_SIZE)

#define LCD_D_OFF rGPCDAT &= ~(1 << 4);

#define LCD_D_ON rGPCDAT |= (1 << 4);

#define MODE_TFT_16BIT_640480 (0x4204)

//Timing parameter for V16C6448AB(PRIME VIEW)

#define VBPD_640480 ((33-1)&0xff)

#define VFPD_640480 ((10-1)&0xff)

#define VSPW_640480 ((2-1) &0x3f)

#define HBPD_640480 ((48-1)&0x7f)

#define HFPD_640480 ((16-1)&0xff)

#define HSPW_640480 ((96-1)&0xff)

#define MVAL (13)

#define MVAL_USED (0)

#define M5D(n) ((n) & 0x1fffff) // To get lower 21bits

#define CLKVAL_TFT_640480 (1)

//53.5hz @90Mhz

//VSYNC,HSYNC should be inverted

#ifndef CONFIG_LCD_BMP

extern const UINT8T g_ucBitmap[][76800];

#endif //HBPD=47VCLK,HFPD=15VCLK,HSPW=95VCLK

//VBPD=32HSYNC,VFPD=9HSYNC,VSPW=1HSYNC

#define LCDFRAMEBUFFER 0x31000000 //_NONCACHE_STARTADDRESS

// 1. The LCD frame buffer should be write-through or non-cachable.

// 2. The total frame memory should be inside 4MB.

// 3. To meet above 2 conditions, the frame buffer should be

// inside the following regions.

// 0x31000000~0x313ffffff,

// 0x31400000~0x317ffffff,

// 0x31800000~0x31bffffff,

// .....

// 0x33800000~0x33bffffff

// LCD CONTROLLER

#define rLCDCON1 (*(volatile unsigned *)0x4d000000) //LCD control 1

#define rLCDCON2 (*(volatile unsigned *)0x4d000004) //LCD control 2

#define rLCDCON3 (*(volatile unsigned *)0x4d000008) //LCD control 3

#define rLCDCON4 (*(volatile unsigned *)0x4d00000c) //LCD control 4

#define rLCDCON5 (*(volatile unsigned *)0x4d000010) //LCD control 5

#define rLCDSADDR1 (*(volatile unsigned *)0x4d000014) //STN/TFT Frame buffer start address 1

#define rLCDSADDR2 (*(volatile unsigned *)0x4d000018) //STN/TFT Frame buffer start address 2

#define rLCDSADDR3 (*(volatile unsigned *)0x4d00001c) //STN/TFT Virtual screen address set

#define rREDLUT (*(volatile unsigned *)0x4d000020) //STN Red lookup table

#define rGREENLUT (*(volatile unsigned *)0x4d000024) //STN Green lookup table

#define rBLUELUT (*(volatile unsigned *)0x4d000028) //STN Blue lookup table

#define rDITHMODE (*(volatile unsigned *)0x4d00004c) //STN Dithering mode

#define rTPAL (*(volatile unsigned *)0x4d000050) //TFT Temporary palette

#define rLCDINTPND (*(volatile unsigned *)0x4d000054) //LCD Interrupt pending

#define rLCDSRCPND (*(volatile unsigned *)0x4d000058) //LCD Interrupt source

#define rLCDINTMSK (*(volatile unsigned *)0x4d00005c) //LCD Interrupt mask

#define rLPCSEL (*(volatile unsigned *)0x4d000060) //LPC3600 Control

#define PALETTE 0x4d000400 //Palette start address

#define rGPCCON (*(volatile unsigned *)0x56000020) //Port C control

#define rGPCDAT (*(volatile unsigned *)0x56000024) //Port C data

#define rGPCUP (*(volatile unsigned *)0x56000028) //Pull-up control C

#define rGPDCON (*(volatile unsigned *)0x56000030) //Port D control

#define rGPDDAT (*(volatile unsigned *)0x56000034) //Port D data

#define rGPDUP (*(volatile unsigned *)0x56000038) //Pull-up control D

#define rGPGCON (*(volatile unsigned *)0x56000060) //Port G control

#define rGPGDAT (*(volatile unsigned *)0x56000064) //Port G data

#define rGPGUP (*(volatile unsigned *)0x56000068) //Pull-up control G

#define LCD_XSIZE_TFT_640480 (640)

#define LCD_YSIZE_TFT_640480 (480)

#define HOZVAL_TFT_640480 (LCD_XSIZE_TFT_640480-1)

#define LINEVAL_TFT_640480 (LCD_YSIZE_TFT_640480-1)

#define SCR_XSIZE_TFT_640480 (LCD_XSIZE_TFT_640480*2)

#define SCR_YSIZE_TFT_640480 (LCD_YSIZE_TFT_640480*2)

UINT32T (*frameBuffer16BitTft640480)[SCR_XSIZE_TFT_640480/2];

void (*PutPixel)(UINT32T,UINT32T,UINT32T);

void (*BitmapView)(UINT8T *pBuffer);

void BitmapViewTft16Bit_640480(UINT8T *pBuffer);

extern void Lcd_port_init(void);

extern void Lcd_Port_Return(void);

unsigned save_rGPCUP,save_rGPCDAT,save_rGPCCON;

unsigned save_rGPDUP,save_rGPDDAT,save_rGPDCON;

void Lcd_port_init(void)

{

save_rGPCCON=rGPCCON;

save_rGPCDAT=rGPCDAT;

save_rGPCUP=rGPCUP;

save_rGPDCON=rGPDCON;

save_rGPDDAT=rGPDDAT;

save_rGPDUP=rGPDUP;

rGPCUP=0xffffffff; // Disable Pull-up register

// rGPCCON=0xaaaaa9aa; // Initialize VD[7:0],LCDVF[2:0],VM,VFRAME,VLINE,VCLK,LEND

rGPCCON=0xaaaaaaaa;

rGPDUP=0xffffffff; // Disable Pull-up register

rGPDCON=0xaaaaaaaa; // Initialize VD[23:8]

// uart_printf(" Initializing GPIO ports..........\n");

}

/***************************************************

* name: Lcd_Port_Return()

* func: Return lcd port configuration

****************************************/

void Lcd_Port_Return(void)

{

rGPCCON=save_rGPCCON;

rGPCDAT=save_rGPCDAT;

rGPCUP=save_rGPCUP;

rGPDCON=save_rGPDCON;

rGPDDAT=save_rGPDDAT;

rGPDUP=save_rGPDUP;

}

/*************************************************

* name: _PutTft16Bit_640480()

* func: put pixel to 16bpp 640*480 TFT

* para: UINT32T x -- x coordinate

* UINT32T y -- y coordinate

* UINT32T c -- color value

*************************************************/

void _PutTft16Bit_640480(UINT32T x,UINT32T y,UINT32T c)

{

if(x

frameBuffer16BitTft640480[(y)][(x)/2]=( frameBuffer16BitTft640480[(y)][x/2]

& ~(0xffff0000>>((x)%2)*16) ) | ( (c&0x0000ffff)<<((2-1-((x)%2))*16) );

}

void Lcd_Init(int type)

{

frameBuffer16BitTft640480=(UINT32T (*)[SCR_XSIZE_TFT_640480/2])LCDFRAMEBUFFER;

rLCDCON1=(CLKVAL_TFT_640480<<8)|(MVAL_USED<<7)|(3<<5)|(12<<1)|0;

// TFT LCD panel,16bpp TFT,ENVID=off

rLCDCON2=(VBPD_640480<<24)|(LINEVAL_TFT_640480<<14)|(VFPD_640480<<6)|(VSPW_640480);

rLCDCON3=(HBPD_640480<<19)|(HOZVAL_TFT_640480<<8)|(HFPD_640480);

rLCDCON4=(MVAL<<8)|(HSPW_640480);

rLCDCON5=(1<<11)|(1<<9)|(1<<8); //FRM5:6:5,HSYNC and VSYNC are inverted

rLCDSADDR1=(((UINT32T)frameBuffer16BitTft640480>>22)<<21)|M5D((UINT32T)frameBuffer16BitTft640480>>1);

rLCDSADDR2=M5D( ((UINT32T)frameBuffer16BitTft640480+(SCR_XSIZE_TFT_640480*LCD_YSIZE_TFT_640480*2))>>1 );

rLCDSADDR3=(((SCR_XSIZE_TFT_640480-LCD_XSIZE_TFT_640480)/1)<<11)|(LCD_XSIZE_TFT_640480/1);

rLCDINTMSK|=(3); // MASK LCD Sub Interrupt

rLPCSEL&=(~7); // Disable LPC3600

rTPAL=0; // Disable Temp Palette

}

void Glib_Init(int type)

{

PutPixel=_PutTft16Bit_640480;

BitmapView=BitmapViewTft16Bit_640480;

}

void Glib_ClearScr(UINT32T c, int type)

{

int i,j;

// type:MODE_TFT_1BIT_640480|MODE_TFT_8BIT_640480|MODE_TFT_16BIT_640480

for(j=0;j<20;j++)

for(i=0;i<20;i++)

PutPixel(i,j,c);

}

void Lcd_PowerEnable(int invpwren,int pwren)

{

//GPG4 is setted as LCD_PWREN

rGPGUP=rGPGUP&(~(1<<4))|(1<<4); // Pull-up disable

rGPGCON=rGPGCON&(~(3<<8))|(3<<8); // GPG4=LCD_PWREN

//Enable LCD POWER ENABLE Function

rLCDCON5=rLCDCON5&(~(1<<3))|(pwren<<3); // PWREN

rLCDCON5=rLCDCON5&(~(1<<5))|(invpwren<<5); // INVPWREN

}

/************************************************************

* name: Lcd_EnvidOnOff

* func: lcd Envid onoff configuration

* para: int onoff -- Envid configuration

*******************************************************************/

void Lcd_EnvidOnOff(int onoff)

{

if(onoff==1)

rLCDCON1|=0x00000001; // ENVID=ON

else

rLCDCON1 =rLCDCON1 & 0x3fffe; // ENVID Off

}

/************************************************************

* name: lcd_init_app

* func: lcd application initialization code

**************************************************************/

void lcd_init_app()

{

Lcd_port_init();

Lcd_Init(MODE_TFT_16BIT_640480);

Glib_Init(MODE_TFT_16BIT_640480);

Glib_ClearScr(0, MODE_TFT_16BIT_640480);

Lcd_PowerEnable(0, 1);

Lcd_EnvidOnOff(1);

}

/********************************************************

* name: lcd_init_app_end

* func: end lcd application initialization

**********************************************************/

void lcd_init_app_end()

{

Lcd_EnvidOnOff(0);

Lcd_Port_Return();

}

/***********************************************************

* name: lcd_clr_rect

* func: fill appointed area with appointed color

* para: usLeft,usTop,usRight,usBottom -- area's rectangle acme coordinate

* ucColor -- appointed color value

******************************************************************/

void lcd_clr_rect(INT16T usLeft, INT16T usTop, INT16T usRight, INT16T usBottom, UINT8T ucColor)

{

UINT32T i, j;

// UINT8T *pDisp = (UINT8T*)LCD_ACTIVE_BUFFER;

for (i = usLeft; i < usRight; i++)

for (j = usTop; j < usBottom; j++)

{

PutPixel(i,j,ucColor);

//*(pDisp+i+j) = ucColor;

}

void lcd_clean(UINT32T c)

{

UINT32T i, j;

UINT32T *pView = (UINT32T*)frameBuffer16BitTft640480;

for (i = 0; i < LCD_YSIZE_TFT_640480; i++)

{

for (j = 0; j < LCD_XSIZE_TFT_640480/2 ; j++)

{

//pView[j] = ((*(pBuffer+3)) << 24) + ((*(pBuffer+2)) << 16) + ((*(pBuffer+1)) << 8) + (*(pBuffer));

pView[j] = c;

//pBuffer += 4;

}

pView+=LCD_XSIZE_TFT_640480;

}

/***********************************************************

* name: color_lcd_test()

* func: LCD test function

**************************************************************/

void color_lcd_init(void)

{

printf("lcd initial start\n");

lcd_init_app();

lcd_clean(0x66665555);

printf("lcd initial end\n");

}

移植uboot1.3.1到s3c2410（8）--lcd支持 (2009-07-30 17:36)分类： Bootloader相关

3）修改/board/Embest/edukit2410/Makefile文件

将lcd.c加入编译。

LIB = $(obj)lib$(BOARD).a

COBJS := edukit2410.o nand_read.o lcd.o flash.o

SOBJS := lowlevel_init.o

4）修改/lib_arm/board.c文件

......

#ifdef CONFIG_HAS_DATAFLASH

extern int AT91F_DataflashInit(void);

extern void dataflash_print_info(void);

#endif

#ifdef CONFIG_DRIVER_LCD

extern void color_lcd_init(void);

#endif

#ifndef CONFIG_IDENT_STRING

#define CONFIG_IDENT_STRING ""

#endif

......

#if defined(CONFIG_DRIVER_LCD)

color_lcd_init();

#endif

/* main_loop() can return to retry autoboot, if so just run it again. */

for (;;) {

main_loop ();

}

/* NOTREACHED - no way out of command loop except booting */

}

4.1 驱动lcd，并显示图片

如果要进一步显示图片需要在第一步的基础上进行修改。

1）修改include/configs/edukit2410.h文件

#define CONFIG_DRIVER_LCD

/*suport LCD*/

#define CONFIG_LCD_BMP

#endif /* __CONFIG_H */

2）添加图片信息文件bmp.c

图片以数组的方式存储，数组名为g_ucBitmap［］，大小自己定义，但要少于800K。

/********************************************************************

* File?? bmp_data.c

* Author: Embest

* Desc?? bmp data

* History:

********************************************************************/

/*------------------------------------------------------------------------------------------*/

/* global variables */

/*------------------------------------------------------------------------------------------*/

const unsigned char g_ucBitmap[614408] = { 0X00,0X10,0X80,0X02,0XE0,0X01,0X01,0X1B,

0X04,0X08,0X04,0X08,0X04,0X08,0X04,0X08,0X04,0X08,0X04,0X08,0X04,0X08,0X05,0X08,

0X05,0X08,0X05,0X08,0X05,0X08,0X05,0X08,0X05,0X08,0X04,0X08,0X04,0X08,0X04,0X08,

0X04,0X08,0X04,0X08,0X04,0X08,0X04,0X08,0X04,0X08,0X04,0X08,0X04,0X08,0X04,0X08,

0X04,0X08,0X04,0X08,0X05,0X08,0X05,0X08,0X05,0X08,0X05,0X08,0X05,0X08,0X05,0X08,

0X04,0X08,0X05,0X08,0X05,0X08,0X05,0X08,0X05,0X08,0X04,0X08,0X05,0X08,0X05,0X08,

0X05,0X08,0X05,0X08,0X05,0X08,0X05,0X08,0X05,0X08,0X05,0X08,0X05,0X08,0X05,0X08,

0X05,0X08,0X05,0X08,0X05,0X08,0X05,0X08,0X05,0X08,0X25,0X08,0X25,0X08,0X25,0X08,

......

}

3）修改/board/Embest/edukit2410/Makefile文件

将bmp.c加入编译。

LIB = $(obj)lib$(BOARD).a

COBJS := edukit2410.o nand_read.o lcd.o bmp.o flash.o

SOBJS := lowlevel_init.o

4）修改/board/Embest/edukit2410/lcd.c，添加图片显示函数。

/*------------------------------------------------------------------------------------------*/

/* extern variables */

/*------------------------------------------------------------------------------------------*/

extern const UINT8T g_ucBitmap[][76800];

......

void lcd_clr_rect(INT16T usLeft, INT16T usTop, INT16T usRight, INT16T usBottom, UINT8T ucColor)

{

UINT32T i, j;

// UINT8T *pDisp = (UINT8T*)LCD_ACTIVE_BUFFER;

for (i = usLeft; i < usRight; i++)

for (j = usTop; j < usBottom; j++)

{

PutPixel(i,j,ucColor);

//*(pDisp+i+j) = ucColor;

}

void BitmapViewTft16Bit_640480(UINT8T *pBuffer)

{

UINT32T i, j,t=0;

UINT32T *pView = (UINT32T*)frameBuffer16BitTft640480;

for (i = 0; i < LCD_YSIZE_TFT_640480; i++)

{

for (j = 0; j < LCD_XSIZE_TFT_640480/2 ; j++)

{

pView[j] = ((*(pBuffer+3)) << 24) + ((*(pBuffer+2)) << 16) + ((*(pBuffer+1)) << 8) + (*(pBuffer));

//pView[j] = 0x88888888;

pBuffer += 4;

}

pView+=LCD_XSIZE_TFT_640480;

}

......

/********************************************************************

* name: color_lcd_init()

* func: LCD test function

* para: none

* ret: none

* modify:

* comment:

********************************************************************/

void color_lcd_init(void)

{

printf("lcd initial start\n");

lcd_init_app();

lcd_clean(0x66665555);

BitmapViewTft16Bit_640480((UINT8T *)(g_ucBitmap));

printf("lcd initial end\n");

}

5）修改/cpu/arm920t/start.S,以支持更大的u－boot自我拷贝

......

@ copy U-Boot to RAM

ldr r0, =TEXT_BASE

mov r1, #0x0

#ifdef CONFIG_LCD_BMP

mov r2, #0x100000

#else

mov r2, #0x30000

#endif

......

移植uboot1.3.1到s3c2410（9）--编译并下载u-boot (2009-08-07 15:28)分类： Bootloader相关

5 编译并下载u－boot

5.1 编译u－boot

$make distclean

$make edukit2410_config

$make

编译成功之后，在当前目录下会生成u－boot.bin文件。

5.2 下载u－boot

这里我们采用powerice将u－boot.bin下载到nandflash0偏移处。

烧写完成后，运行minicom，显示串口输出信息：

U-Boot 1.3.1 (Nov 29 2008 - 15:21:16)

DRAM: 64 MB

Flash: 1 MB

NAND: NAND flash probing at 0x4E000000

64 MB

In: serial

Out: serial

Err: serial

dm9000 i/o: 0x20000000, id: 0x90000a46

MAC: 08:00:3e:26:0a:5b

operating at 100M full duplex mode

lcd initial start

lcd initial end

Hit any key to stop autoboot: 0

[ edukit2410]#

按任意键终止自动运行模式。

5.3 使用u－boot自更新

1）更新不带图片显示的u-boot.bin

（1）将编译生成的u－boot.bin拷贝到处tftp目录下面。

（2）将u－boot.bin下载到sdram中间

[ edukit2410]# tftp 30000000 u-boot.bin

（3）擦除nandflash，起始地址为0，大小为0x30000

[ edukit2410]# nand erase 0 30000

（4）将u－boot.bin固化到nandflash中

[ edukit2410]# nand write 30000000 0 30000

2）更新不带图片显示的u-boot.bin

（1）将编译生成的u－boot.bin拷贝到处tftp目录下面。

（2）将u－boot.bin下载到sdram中间

[ edukit2410]# tftp 30000000 u-boot.bin

（3）擦除nandflash，起始地址为0，大小为0x100000

[ edukit2410]# nand erase 0 100000

（4）将u－boot.bin固化到nandflash中

[ edukit2410]# nand write 30000000 0 100000

移植uboot1.3.1到s3c2410（10）--使用uboot引导内核 (2009-08-07 15:32)分类： Bootloader相关

6 使用u－boot下载引导内核

6.1 制作uImage(在tftp目录下存在zImage文件)

~/u-boot-1.3.1$ sudo cp tools/mkimage /usr/bin/

~/u-boot-1.3.1$ cd /home/example/tftp/

$ ./mkimage -A arm -O linux -T kernel -C none -a 30080000 -e 30080000 -n linux-2.6.14.1_ds9000 -d zImage uImage

Image Name: linux-2.6.14.1_ds9000

Created: Sat Nov 29 16:21:35 2008

Image Type: ARM Linux Kernel Image (uncompressed)

Data Size: 1785268 Bytes = 1743.43 kB = 1.70 MB

Load Address: 0x30080000

Entry Point: 0x30080000

6.2 查看u－boot支持命令

[ edukit2410]# help

6.3 查看启动参数是否配置正确

[ edukit2410]# printenv

bootdelay=3

baudrate=115200

ethaddr=08:00:3e:26:0a:5b

netmask=255.255.255.0

ipaddr=192.168.2.199

serverip=192.168.2.34

bootargs=console=ttySAC1 root=/dev/mtdblock/3 rootfstype=yaffs

bootcmd=tftp 30800000 uImage

stdin=serial

stdout=serial

stderr=serial

Environment size: 256/65532 bytes

如果要修改参数请使用setenv命令。比如要设置新的ipaddr：

[ edukit2410]# setenv ipaddr 192.168.2.199

[ edukit2410]# saveenv

Saving Environment to NAND...

Erasing Nand...Writing to Nand... done

[ edukit2410]#

6.4 下载uImage到指定位置，并启动内核

[ edukit2410]# tftp 30800000 uImage

dm9000 i/o: 0x20000000, id: 0x90000a46

MAC: 08:00:3e:26:0a:5b

operating at 100M full duplex mode

TFTP from server 192.168.2.34; our IP address is 192.168.2.199

Filename 'uImage'.

Load address: 0x30800000

Loading: ########################################################################################################## ###############################################################################################################################################################

done

Bytes transferred = 1785332 (1b3df4 hex)

[ edukit2410]# bootm

这样就完成了利用u－boot下载并引导内核。

http://blogimg.chinaunix.net/blog/upfile2/090807160102.rar

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鲁班锁八角球解法:移植uboot1.3.1到s3c2410

1 在U-Boot中建立自己的开发板类型，并测试编译

1） 在工作目录下解压U－Boot

2）进入U-Boot目录，修改Makefile

3）在/board子目录中建立自己的开发板edukit2410目录

4）在include/configs/中建立配置头文件

5）测试编译能否成功

2 修改U-boot文件，以支持nandflash读写

2.1 修改/cpu/arm920t/start.S

2.2 创建nandflash读函数

2.3 修改board/Embest/edukit2410/Makefile文件

2.4 修改include/configs/edukit2410.h文件

2.1 修改board/Embest/edukit2410/lowlevel_init.S文件

2.2 修改/board/Embest/edukit2410/edukit2410.c

2.3 为了实现NAND Flash的读写，再次修改/include/configs/edukit2410.h

2.1 修改文件/cpu/arm920t/s3c24x0/interrupts.c文件

2.2 修改include/linux/mtd/nand_ids.h

2.3 修改include/linux/mtd/nand.h

2.4 修改/lib_arm中的board.c

2.5 修改common/env_nand.c

2.1 在/board/Embest/edukit2410/edukit2410.c文件的末尾添加对Nand Flash 的初始化函数（在后面Nand Flash的操作都要用到）

1 修改U-boot文件，以支持DM9000AEP

3.1 修改include/configs/edukit2410.h文件

3.2 修改lib_arm/board.c文件

3.3 修改drivers\net\dm9000x.c文件

4 修改U-boot文件，添加LCD驱动

4.1 驱动lcd，并刷屏

1）修改include/configs/edukit2410.h文件

2）添加LCD驱动及初始化函数

3）修改/board/Embest/edukit2410/Makefile文件

4）修改/lib_arm/board.c文件

4.1 驱动lcd，并显示图片

1）修改include/configs/edukit2410.h文件

2）添加图片信息文件bmp.c

3）修改/board/Embest/edukit2410/Makefile文件

4）修改/board/Embest/edukit2410/lcd.c，添加图片显示函数。

5）修改/cpu/arm920t/start.S,以支持更大的u－boot自我拷贝

5 编译并下载u－boot

5.1 编译u－boot

5.2 下载u－boot

5.3 使用u－boot自更新

1）更新不带图片显示的u-boot.bin

（1） 将编译生成的u－boot.bin拷贝到处tftp目录下面。

（2） 将u－boot.bin下载到sdram中间

（3） 擦除nandflash，起始地址为0，大小为0x30000

（4） 将u－boot.bin固化到nandflash中

2）更新不带图片显示的u-boot.bin

（1） 将编译生成的u－boot.bin拷贝到处tftp目录下面。

（2） 将u－boot.bin下载到sdram中间

（3） 擦除nandflash，起始地址为0，大小为0x100000

（4） 将u－boot.bin固化到nandflash中

6 使用u－boot下载引导内核

6.1 制作uImage(在tftp目录下存在zImage文件)

6.2 查看u－boot支持命令

6.3 查看启动参数是否配置正确

6.4 下载uImage到指定位置，并启动内核

1）在工作目录下解压U－Boot

（1）将编译生成的u－boot.bin拷贝到处tftp目录下面。

（2）将u－boot.bin下载到sdram中间

（3）擦除nandflash，起始地址为0，大小为0x30000

（4）将u－boot.bin固化到nandflash中

（1）将编译生成的u－boot.bin拷贝到处tftp目录下面。

（2）将u－boot.bin下载到sdram中间

（3）擦除nandflash，起始地址为0，大小为0x100000

（4）将u－boot.bin固化到nandflash中